Crack azimuths on Europa: The G1 lineament sequence revisited
A.R. Sarid, R. Greenberg, G.V. Hoppa, D.M. Brown Jr., P. Geissler
2005, Icarus (173) 469-479
The tectonic sequence in the anti-jovian area covered by regional mapping images from Galileo's orbit E15 is determined from a study of cross-cutting relationships among lineament features. The sequence is used to test earlier results from orbit G1, based on lower resolution images, which appeared to display a progressive change...
The ubiquitous nature of accessory calcite in granitoid rocks: Implications for weathering, solute evolution, and petrogenesis
A. F. White, M. S. Schulz, J. B. Lowenstern, D.V. Vivit, T.D. Bullen
2005, Geochimica et Cosmochimica Acta (69) 1455-1471
Calcite is frequently cited as a source of excess Ca, Sr and alkalinity in solutes discharging from silicate terrains yet, no previous effort has been made to assess systematically the overall abundance, composition and petrogenesis of accessory calcite in granitoid rocks. This study addresses this issue by analyzing a worldwide...
Speciation of mercury and mode of transport from placer gold mine tailings
A.J. Slowey, J. J. Rytuba, Gordon E. Brown Jr.
2005, Environmental Science & Technology (39) 1547-1554
Historic placer gold mining in the Clear Creek tributary to the Sacramento River (Redding, CA) has highly impacted the hydrology and ecology of an important salmonid spawning stream. Restoration of the watershed utilized dredge tailings contaminated with mercury (Hg) introduced during gold mining, posing the possibility of persistent Hg release...
Unusually low rates of slip on the Santa Rosa Range fault zone, northern Nevada
S. F. Personius, S. A. Mahan
2005, Bulletin of the Seismological Society of America (95) 319-333
The Santa Rosa Range fault zone (SRRFZ) is one of the most topographically prominent normal fault systems in the northern Basin and Range province of the western United States. It has been assigned high rates of vertical slip by others and has been identified as a possible site of the...
Limiting similarity and functional diversity along environmental gradients
D.W. Schwilk, D. D. Ackerly
2005, Ecology Letters (8) 272-281
Recent developments in community models emphasize the importance of incorporating stochastic processes (e.g. ecological drift) in models of niche-structured community assembly. We constructed a finite, spatially explicit, lottery model to simulate the distribution of species in a one-dimensional landscape with an underlying gradient in environmental conditions. Our framework combines the...
Wave spectral energy variability in the northeast Pacific
P.D. Bromirski, D.R. Cayan, R.E. Flick
2005, Journal of Geophysical Research C: Oceans (110) 1-15
The dominant characteristics of wave energy variability in the eastern North Pacific are described from NOAA National Data Buoy Center (NDBC) buoy data collected from 1981 to 2003. Ten buoys at distributed locations were selected for comparison based on record duration and data continuity. Long‐period (LP) [T > 12] s, intermediate‐period...
Broad-scale predictors of canada lynx occurrence in eastern North America
C.L. Hoving, D.J. Harrison, W.B. Krohn, R.A. Joseph, M. O'Brien
2005, Journal of Wildlife Management (69) 739-751
The Canada lynx (Lynx canadensis) is listed as a threatened species throughout the southern extent of its geographic range in the United States. Most research on lynx has been conducted in the western United States and Canada; little is known about the ecology of lynx in eastern North America. To...
Cassini Visual and Infrared Mapping Spectrometer observations of Iapetus: Detection of CO2
B. J. Buratti, D. P. Cruikshank, R. H. Brown, R. N. Clark, J.M. Bauer, R. Jaumann, T. B. McCord, D.P. Simonelli, C. A. Hibbitts, G. B. Hansen, T.C. Owen, K. H. Baines, G. Bellucci, J.-P. Bibring, F. Capaccioni, P. Cerroni, A. Coradini, P. Drossart, V. Formisano, Y. Langevin, D. L. Matson, V. Mennella, R.M. Nelson, P. D. Nicholson, B. Sicardy, Christophe Sotin, T. L. Roush, K. Soderlund, A. Muradyan
2005, Astrophysical Journal (622)
The Visual and Infrared Mapping Spectrometer (VIMS) instrument aboard the Cassini spacecraft obtained its first spectral map of the satellite lapetus in which new absorption bands are seen in the spectra of both the low-albedo hemisphere and the H2O ice-rich hemisphere. Carbon dioxide is identified in the low-albedo material, probably...
Prenatal development in fishers (Martes pennanti)
H.C. Frost, W.B. Krohn, E.A. Bezembluk, R. Lott, C.R. Wallace
2005, Theriogenology (63) 1440-1453
We evaluated and quantified prenatal growth of fishers (Martes pennanti) using ultrasonography. Seven females gave birth to 21 kits. The first identifiable embryonic structures were seen 42 d prepartum; these appeared to be unimplanted blastocysts or gestational sacs, which subsequently implanted in the uterine horns. Maternal and fetal heart rates...
Freshwater mussel shells as environmental chronicles: Geochemical and taphonomic signatures of mercury-related extirpations in the North Fork Holston River, Virginia
M.E. Brown, M. Kowalewski, R. J. Neves, D.S. Cherry, M.E. Schreiber
2005, Environmental Science & Technology (39) 1455-1462
This study utilized freshwater mussel shells to assess mercury (Hg) contamination in the North Fork Holston River that extirpated (caused local extinctions of) a diverse mussel fauna. Shells (n = 366) were collected from five sites situated upstream (two sites), just below (one site), and downstream (two sites) of the...
Distribution patterns of mercury in Lakes and Rivers of northeastern North America
Ian F. Dennis, Thomas A. Clair, Charles T. Driscoll, Neil Kamman, Ann T. Chalmers, Jamie Shanley, Stephen A. Norton, Steve Kahl
2005, Ecotoxicology (14) 113-123
We assembled 831 data points for total mercury (Hgt) and 277 overlapping points for methyl mercury (CH3Hg+) in surface waters from Massachussetts, USA to the Island of Newfoundland, Canada from State, Provincial, and Federal government databases. These geographically indexed values were used to determine: (a) if large-scale spatial distribution patterns...
Cultural change in the songs of humpback whales (Megaptera novaeangliae) from Tonga
N. Eriksen, L.A. Miller, J. Tougaard, D.A. Helweg
2005, Behaviour (142) 305-328
Some humpback whales migrate annually from Antarctic feeding grounds to the seas around the Tongan Islands to give birth and mate. The Tongan humpbacks are considered part of Southern Hemisphere Group V that splits during migration, some swimming to Eastern Australia and others to various Polynesian Islands. During this time...
From the field: Brown bear habituation to people — Safety, risks, and benefits
Stephen Herrero, Tom Smith, Terry D. DeBruyn, Kerry Gunther, Colleen A. Matt
2005, Wildlife Society Bulletin (33) 362-373
Recently, brown bear (Ursus arctos) viewing has increased in coastal Alaska and British Columbia, as well as in interior areas such as Yellowstone National Park. Viewing is most often being done under conditions that offer acceptable safety to both people and bears. We analyze and comment on the underlying processes...
Use of dissolved and vapor‐phase gases to investigate methanogenic degradation of petroleum hydrocarbon contamination in the subsurface
Richard T. Amos, K. Ulrich Mayer, Barbara A. Bekins, Geoffrey N. Delin, Randi L. Williams
2005, Water Resources Research (41)
At many sites contaminated with petroleum hydrocarbons, methanogenesis is a significant degradation pathway. Techniques to estimate CH4 production, consumption, and transport processes are needed to understand the geochemical system, provide a complete carbon mass balance, and quantify the hydrocarbon degradation rate. Dissolved and vapor‐phase gas data collected at a petroleum hydrocarbon...
Scat removal: A source of bias in feces-related studies
T. R. Livingston, Philip S. Gipson, Warren B. Ballard, D. M. Sanchez, Paul R. Krausman
2005, Wildlife Society Bulletin (33) 172-178
Consumption of feces (coprophagy) may alter findings of dietary studies and population estimates based on fecal analyses, but its magnitude is poorly understood. We investigated seasonal incidence of scat removal on Fort Riley, Kansas, from January through December 2000. We placed feces from captive bobcats (Lynx rufus), captive coyotes (Canis...
The effect of thiamine injection on upstream migration, survival, and thiamine status of putative thiamine-deficient coho salmon
J.D. Fitzsimons, B. Williston, P. Amcoff, L. Balk, C. Pecor, H. G. Ketola, J. P. Hinterkopf, D. C. Honeyfield
2005, Journal of Aquatic Animal Health (17) 48-58
A diet containing a high proportion of alewives Alosa pseudoharengus results in a thiamine deficiency that has been associated with high larval salmonid mortality, known as early mortality syndrome (EMS), but relatively little is known about the effects of the deficiency on adults. Using thiamine injection (50 mg thiamine/kg body...
Multilevel assessment of fish species traits to evaluate habitat degradation in streams of the upper midwest
R. M. Goldstein, M. R. Meador
2005, North American Journal of Fisheries Management (25) 180-194
We used species traits to examine the variation in fish assemblages for 21 streams in the Northern Lakes and Forests Ecoregion along a gradient of habitat disturbance. Fish species were classified based on five species trait-classes (trophic ecology, substrate preference, geomorphic preference, locomotion morphology, and reproductive strategy) and 29 categories...
Relative abundance, age, growth, and fecundity of grubby Myoxocephalus aenaeus in Niantic River and Niantic Bay, Long Island Sound
E.F. Roseman, C.A. Tomichek, T. Maynard, J.A. Burton
2005, Journal of Sea Research (53) 309-318
Grubby (Myoxocephalus aenaeus, Cottidae) is a common benthic fish of inshore waters and estuaries of eastern Long Island Sound; however, little information exists on their life history or population demographics. This study utilised a long-term data series (1976-2002) to assess grubby life history and population demographics and explores trends in...
Mid-Pliocene deep-sea bottom-water temperatures based on ostracode Mg/Ca ratios
T. M. Cronin, H.J. Dowsett, Gary S. Dwyer, P.A. Baker, M.A. Chandler
2005, Marine Micropaleontology (54) 249-261
We studied magnesium:calcium (Mg/Ca) ratios in shells of the deep-sea ostracode genus Krithe from a short interval in the middle Pliocene between 3.29 and 2.97 Ma using deep-sea drilling sites in the North and South Atlantic in order to estimate bottom water temperatures (BWT) during a period of climatic warmth....
Vapor-phase exchange of perchloroethene between soil and plants
G.C. Struckhoff, J.G. Burken, J.G. Schumacher
2005, Environmental Science & Technology (39) 1563-1568
Tree core concentrations of tetrachloroethylene (perchloroethene, PCE) at the Riverfront Superfund Site in New Haven, MO, were found to mimic the profile of soil phase concentrations. The observed soil-tree core relationship was stronger than that of groundwater PCE to tree core concentrations at the same site. Earlier research has shown...
Effects of turbidity, light level, and cover on predation of white sturgeon larvae by prickly sculpins
D.M. Gadomski, M.J. Parsley
2005, Transactions of the American Fisheries Society (134) 369-374
White sturgeon Acipenser transmontanus occur in rivers of the western United States and southwestern Canada, but some populations are in decline because of recruitment failure. Many river systems in this area have been altered as a result of development that has caused major environmental changes. Our goal was to examine...
Origin of secondary sulfate minerals on active andesitic stratovolcanoes
D. R. Zimbelman, R. O. Rye, G. N. Breit
2005, Chemical Geology (215) 37-60
Sulfate minerals in altered rocks on the upper flanks and summits of active andesitic stratovolcanoes result from multiple processes. The origin of these sulfates at five active volcanoes, Citlalte??petl (Mexico), and Mount Adams, Hood, Rainier, and Shasta (Cascade Range, USA), was investigated using field observations, petrography, mineralogy, chemical modeling, and...
Hierarchical faunal filters: An approach to assessing effects of habitat and nonnative species on native fishes
M.C. Quist, F.J. Rahel, W.A. Hubert
2005, Ecology of Freshwater Fish (14) 24-39
Understanding factors related to the occurrence of species across multiple spatial and temporal scales is critical to the conservation and management of native fishes, especially for those species at the edge of their natural distribution. We used the concept of hierarchical faunal filters to provide a framework for investigating the...
A new synziphosurine (Chelicerata: Xiphosura) from the Late Llandovery (Silurian) Waukesha Lagerstatte, Wisconsin, USA
R. A. Moore, D. E. G. Briggs, S. J. Braddy, L. I. Anderson, Donald G. Mikulic, Joanne Kluessendorf
2005, Journal of Paleontology (79) 242-250
A new synziphosurine (Chelicerata:Xiphosura) is described from the Late Llandovery (Silurian) Konservat-Lagerstätte of Waukesha, Wisconsin, USA. Venustulus waukeshaensis n.gen. and sp. is characterized by a semicircular carapace with a slightly procurved posterior margin lacking genal spines and an opisthosoma composed of 10 freely articulating segments, divided into a preabdomen of seven...
Prey consumption and energy transfer by marine birds in the Gulf of Alaska
G.L. Hunt Jr., G.S. Drew, J. Jahncke, John F. Piatt
2005, Conference Paper, Deep-Sea Research Part II: Topical Studies in Oceanography
We investigated prey consumption by marine birds and their contribution to cross-shelf fluxes in the northern Gulf of Alaska. We utilized data from the North Pacific Pelagic Seabird Database for modeling energy demand and prey consumption. We found that prey consumption by marine birds was much greater over the continental...
